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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        h3 {
            font-weight : 400; 
            /* font-weight: normal; */
        }

        div {
            /* font-weight: 700; */
            font-weight: bold;
        }
    </style>
</head>
<body>
    <img src="https://anduin.oss-cn-nanjing.aliyuncs.com/20231125184140.png"/>

    <!-- 取消加粗 -->
    <h3>h3 标题</h3>

    <!-- 加粗 -->
    <div>div 标签</div>
</body>
</html>